MEGATRO 220KV transmission line 2240 ZM1 cat head type suspension tower This photo refers to 220KV transmission line 2240 ZM1 cat head type suspension tower&comma; Conductor lined in triangle shape with double earth wire&comma; which is widely used tower type from 21st century&period; Some of their technical data as follow&colon;

Application scope

220kvtranssmission line

tower name

suspension tower

tower type

2240ZM1

Design condition

Nominal height&lpar;m&rpar;

steel weight&lpar;kg&rpar;

Conductor type

2×LGJ-300&sol;40

15

2865

Earth wire type

GJ-50

18

3205

Max&period;wind speed&lpar;m&sol;s&rpar;

30

21

3536

Max&period;ice&lpar;mm&rpar;

10

24

3871

Horizontal span&lpar;m&rpar;

380

27

4167

Vertical span&lpar;m&rpar;

550

Angle

&

Design condition

Nominal height&lpar;m&rpar;

Horizontal span&lpar;m&rpar;

Vertical span&lpar;m&rpar;

steel weight&lpar;kg&rpar;

Conductor type

2×LGJ-240

15&period;0

400

600

2728&period;7

Earth wire type

GJ-50

18&period;0

3042&period;5

Max&period; design wind speed&lpar;m&sol;s&rpar;

30

21&period;0

3400&period;1

Design ice thickness&lpar;mm&rpar;

10

24&period;0

3702&period;9

27&period;0

380

550

4066&period;1

Remark&colon; above technical data only references for our client&comma; we can design every type for our overseas clients&period;

MEGATRO is a full service engineering company with a global reputation for delivering excellence and innovation in power transmission&comma; transformation&comma; distribution&comma; and telecommunications systems&period; Our MEGATRO provide and design this type 220KV transmission line 2240 ZM1 cat head type suspension tower mainly for our overseas client&period; Since 2004&comma; MEGATRO focus mainly international market and had export many kind of transmission structures to overseas clients&period; MEGATRO has been manufacturing lattice transmission tower & tapered steel poles for lighting&comma; traffic control&comma; communication and utility applications&period; MEGATRO pioneered the development of transmission tower&comma; telecom tower&comma; substation&comma; and other steel structure and was also at the forefront in the design of Transmission tower&period;

Over 10 years of experience and innovation in engineering&comma; designing and building towers has evolved MEGATRO into its current form&colon;Full Turn-Key provider including site acquisition&comma; engineering services&comma; manufacturing&comma; field services-DAS&comma; tech services&comma; value added reseller and monitoring&comma; maintenance and network ownershipSpecialize in developing supplying and building wireless and wired networks and in-building telecommunications systems&comma; as well as energy infrastructureSingle source from Design to System IntegrationTop quality&comma; ISO 9001 registeredA complete selection of towers including self-support&comma; lattice steel tower&comma; monopoles and guyed towers&comma; form custom-designed radar towers to broadcast towers and energy infrastructure&period; MEGATRO carries a variety of related products including fall protection&comma; transmission lines&comma; antennas&comma; obstruction lights&comma; and accessories&comma; and other products if client need&comma; MEGATRO also tailored product as per client condition&period; MEGATRO mainly design all kinds of towers and posts for&colon;TelecomsPower transmissionTV and Radio BroadcastRoads and City DevelopmentWind energy solution Steel structure and workshop Our complete selection of towers includes&colon;Self-supportingMonopolesGuyed towersCustom-designed radar towersBroadcast towersPower transmissionMEGATRO also designs and manufactures tower related products including&colon;Fall protectionAntenna bracketsOther accessories if needed by clientsToday&comma; with over 10 years of experience and our commitment to excellence&comma; MEGATRO remains an industry leader in the manufacture and design of steel tubular & angular & monopole structures for all Highway&comma; Municipal&comma; Custom&comma; telecom&comma; lighting and electric Utility applications&period; MEGATRO has a complete staff of professional engineering personnel trained in the PLS Pole program and three different manufacturing processes for producing steel towers&comma; poles and other supports&period; We utilize the latest versions of PLS-CADD&comma; PLS-POLE&comma; TOWER&comma; AutoCAD and other CAD software&period;

The structure shall be designed according to load combinations given as per IEC 61936-1 and as illustrated below&colon;Normal loads1 Dead weight load2 Tension load3 Erection load4 wind load

MEGATRO performs in-house design activities specializing in electrical overhead transmission &telecom tower steel works&comma; which include wind and earthquake loading&comma; static analysis&comma; stress analysis by finite element methods and fatigue&period; Our Engineering Department is boasting of highly qualified engineering who are conversant with international codes and standards&period; The work is carried out with extensive use of CAE&sol;CAD via a large of computer network&period; The computer hardware & drafting software are liked to the CNC workshop equipment for downloading of information thereby eliminating error and saving valuable production time&period;

Besides&comma; MEGATRO is one of the few manufactures who assemble a face of 220KV transmission line 2240 ZM1 cat head type suspension tower&period; This attention to quality may not be the cheapest process but it does insure every tower meets our high standards of quality&period; And it helps to reduce on-site construction cost due to mismatched assemblies&period; After fabrication all 220KV transmission line 2240ZM1 cat head type suspension towers are delivered to the galvanizing facility to be Hot DIP Galvanized&period; Towers are processed through the facility by Caustic Cleaning&comma; Pickling&comma; and then Fluxing&period; These strict procedures insure years of maintenance free towers&period; MEGATRO' 220KV transmission line 2240ZM1 cat head type suspension towers systems can accommodate a variety of cross-arm&period; MEGATRO also offers a wide variety of accessories and mounts&period;

Other information&colon;Availability size&colon; Based on the customer's requirements&period;Material&colon; Chinese material or as per clients requirementSteel gradesTower legs&colon; Chinese steel Q345B&comma; which equivalent to ASTM A572 GR50Other webs&comma; bracing and not stress plate and angle steel&colon; Chinese Q235B&comma; which equivalent to ASTM A36Plates&colon; Chinese steel Q345B&comma; which equivalent to ASTM A572 GR50Bolts&colon; Bolt quality shall be Chinese Class 6&period;8 and 8&period;8&comma; as per our Chinese standard&comma; or ISO 898 standard or ASTM A394 type 0&comma;1&comma;2&comma;3 requirementsThe anti-theft bolts shall be Huck bolt Fasteners or approved equivalent&period; The fasteners shall be manufactured from high tensile steel A242 or equivalent and hot-dip galvanized in accordance with ASTM specification A153 and A394&period;

Fabrication standard&colon; Chinese Standard or other standard which client acceptedA&rpar; Dimension and tolerance for angle are according to GB&sol;T1591-1994&comma; similar to EN 10056-1&sol;2B&rpar; Hot dip galvanization in accordance with GB&sol;T 13912-2002&comma; which similar to ASTM A 123C&rpar; The welding will be performance in accordance with AWS D1&period;1 or CWB standardD&rpar; All fastener galvanization conform to ASTM A153 requirements&period;

Package&colon; Both parties discuss before deliveryPort of Loading&colon; Qingdao PortLead Time&colon; One month or based on the customer's needs &lpar; for time being our capacity about 5000 tons one month&comma; and can meet client requirements&rpar;Minimum order&colon; 1 set

General Fabrication RequirementsHere is general fabrication requirements for our transmission tower&semi; however&comma; both parties must discuss all drawings and confirm all shop drawings&comma; technical specification&comma; and which standard to conform&period; Before mass production&comma; we must received all signed approved shop drawings and technical documents from our client&period;

Our Fabrication shall be in strict accordance with detail Drawings prepared by the Contractor and approved by the Engineer&period; Fabrication shall begin after the approval of the shop assembly and tests&period;

Shearing

Shearing and cutting shall be performed carefully and all portions of the work which will be exposed to view after completion shall be finished neatly&period; Manually guided cutting torches shall not be used&period;

All material over 13 &lpar;or 12&rpar; mm thick shall be cold sawn or machine flame cut&period;Cropping or shearing shall be allowed for material thickness of 13 mm or less&period;Flame cutting of high yield steel shall be preceded by a slight preheat operation by passing the cutting flame over the part to be cut&period;All flame-cut edges shall be ground clean&period;

Bending

Bending shall be carried out in such a manner as to avoid indentation and surface damage&period; All bending over 5o&comma; or high yield steel&comma; shall be performed while the material is hot&period;

Welding

No welding shall be done unless prior approval has been obtained from the Engineer&period;Welding shall not be allowed at tower attachment points for conductor&comma; shield-wire&comma; insulators or associated assemblies or brackets&period;

Sub-punching

All holes in structural steel less than 10 mm thickness may be punched to full size unless otherwise noted on the approved Drawings&period; Holes shown on the Drawings as drilled holes and all holes in structural steel 10 mm or more in thickness and tension members of cross-arms shall be drilled or sub-punched and reamed&period;

All holes shall be clean cut and without torn or ragged edges&period; All burrs resulting from reaming or drilling shall be removed&period; All holes shall be cylindrical and perpendicular to the member&period;

Where necessary to avoid distortion of the holes&comma; holes close to the points of bends shall be made after bending&period;

Punching

For punching to full size&comma; the diameter of the punch shall be 1&period;0 mm larger than the nominal diameter of the bolt&comma; and the diameter of the die shall not be more than 1&period;5mm larger than the diameter of the punch&period; For sub-punching&comma; the diameter of the punch shall be 4 mm smaller than the nominal diameter of the bolt&comma; and the diameter of the die shall be not more than 2 mm larger than the diameter of the punch&period; Sub-punching for reamed work shall be such that after reaming no punch surface shall appear in the periphery of the hole&period;

Hole Size

Where holes are reamed or drilled&comma; the diameter of the finished hole shall be not greater than the nominal diameter of the bolt plus 1&period;0 mm&period;

Accuracy

All holes shall be spaced accurately in accordance with the Drawings and shall be located on the gauge lines&period;

The maximum allowable variation in hole spacing from that indicated on the Drawings for all bolt holes shall be 0&period;8 mm&period;

Fabrication Tolerances

A specification for tolerances shall be submitted for approval by the Engineer prior to commencement of fabrication&period;

Bolt List

A complete list of bolts showing their lengths and the members&comma; which they are to connect shall be given on the erection diagrams&period;

Locking Devices

Locking devices for tower bolts will not be required&comma; but point punching shall be performed&period;

Anti-theft Fasteners

Appropriate anti-theft fasteners for example Huck-bolting shall be applied on all the towers up to the level of anti-climbing devices&comma; to prevent theft of tower members&period;Piece Marks

All pieces shall be stamped before galvanizing with the piece marks shown on the erection Drawings&comma; with the marking not less than 20 mm high placed in the same relative location on all pieces&period; The marking shall be plainly visible after galvanizing&period;

Galvanizing

All material shall be hot-dip galvanized after fabrication in accordance with the latest revision of GB&sol;T 13912-2002 or ASTM Specification A 123&period;

Material that has been rejected because of bare spots or other coating defects shall either be stripped and re-galvanized&comma; or the uncoated areas shall be recoated by an approved method&period;

All plates and shapes which have been warped by the galvanizing process shall be straightened by being re-rolled or pressed&period; The material shall not be hammered or otherwise straightened in a manner that will injure the protective coating&period;

Approval shall be secured from the Engineer if galvanizing is done outside of the Contractor's plant&period;

All galvanized steelwork shall be protected against white storage stain by using an approved dichromate solution treatment immediately following galvanizing&period;